/ Dictionary / Index T teleost: Meaning and Definition of Find definitions for: tel•e•ost Pronunciation: (tel'ē-ost", tē'lē-), [key] — adj. belonging or pertaining to the Teleostei, a group of bony fishes including most living species. —n. Also calleda teleost fish. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: teleost (Thesaurus) teleonomy telepathist Related Content Daily Word Quiz: diaphanous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language